Secretariat

Steffanie Schirren
Institute of Climate-Smart Agriculture

Bundesallee 65
38116 Braunschweig
Phone: +49 531 596 2602
Fax: +49 531 596 2699
ak@thuenen.de


Eternal C

Project

900 mesocosms filled with soil and isotopic labeled organic matter (c) Thünen-Institut/AK
900 mesocosms filled with soil and isotopic labeled organic matter (© Thünen-Institut/AK)

Eternal-C – Long term turnover and stabilisation of organic matter in topsoils and subsoils

The turnover of organic matter is decreased in subsoils compared to topsoils. The underlying processes and controlling factors are unclear and require long-term experiments such as the one conducted in the Eternal-C project.

Background and Objective

Subsoils have a large potential to store soil organic carbon on long-term since the carbon turnover in subsoils is slow. The aim of the Eternal-C project is to quantify turnover rates of litter derived organic matter in topsoil and subsoil at three different sites to assess the underlying processes for the higher C stabilisation in subsoils.

Approach

Three sites were selected with the same vegetation (deciduous forest) and climate (central Europe) but different soils (texture) and in total 900 mesocosms were inserted into the topsoil and subsoils in spring 2018. These mesocosms were filled with different amounts of decomposed beech leave litter that was isotopically labeled. Within a time period of 20 years (till 2038) the mesocosms are going to be sampled and the fate of the litter will be analysed. The project is coordinated by the Thünen Institute of Climate-Smart Agriculture and conducted in cooperation with the Technical University Dresden, the Leibnitz University Hannover, The University Hohenheim, the Helmholtz Institute for Environmental Research Halle and the Northwest German Forest Research Institute.

Thünen-Contact


Involved Thünen-Partners


Involved external Thünen-Partners


Duration

3.2018 - 2.2038

More Information

Projekt type:
Project status: ongoing

Installation of the mesocosms at the experimental site Krofdorf in April 2018
Installation of the mesocosms at the experimental site Krofdorf in April 2018 (© Thünen-Institut/AK)
Three mesocosms installed in 70 cm depth in the subsoil of the experimental site Braunschweig
Three mesocosms installed in 70 cm depth in the subsoil of the experimental site Braunschweig (© Thünen-Institut/AK)